Browsing Institutt for energi og prosessteknikk by Title
Now showing items 1-20 of 4325
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1-D phenomenological modelling of gas-solid fluidized bed reactors for chemical looping reforming
(Doctoral theses at NTNU;2018:9, Doctoral thesis, 2018)This PhD thesis is a part of the EU FP7 Project called NanoSim. The main objective of this work is to develop a 1-D phenomenological model for fluidized bed reactors to simulate the performance of second-generation CO2 ... -
1D modelling of membrane-assisted chemical looping reforming
(Journal article; Peer reviewed, 2017)Membrane-assisted chemical looping reforming (MA-CLR) has been proposed as an alternative to the conventional CLR technology. In this work, a non-isothermal 1D model is used to simulate the MA-CLR fuel reactor. The effect ... -
2D simulation of temperature distribution within large-scale PEM electrolysis stack based on thermal conductivity measurements
(Journal article; Peer reviewed, 2024)Polymer electrolyte membrane electrolyser cells (PEMEC) are recognized as highly suitable for large-scale green hydrogen production from variable renewable sources. To enhance production rates in PEMECs, current densities ... -
2D wavelet analysis of the free surface with subsurface turbulence
(Master thesis, 2021)Wavelet-transformasjoner er et kraftig verktøy i dataanalyse og datasyn. Her skal vi bruke dem til å identifisere turbulente strukturer i nærheten av overflaten ved å se på avtrykket de har på overflaten. 2D-wavelet-tran ... -
3D Simulering av pumpeturbinkarakteristikker
(Master thesis, 2009)I oppgaven har karakteristikkene for en pumpeturbin blitt simulert. Verktøyet for simuleringene har vært OpenFOAM. Griddene til simuleringene ble laget i Gambit og ble importert til OpenFOAM via fluent gridformat. Geometrien ... -
A 7-field Lagrangian slug capturing and slug tracking model with higher order methods
(Doctoral theses at NTNU;2017:246, Doctoral thesis, 2017)In this thesis, a 7-field Lagrangian slug capturing and slug tracking model with higher order methods and an adaptive grid is investigated for predicting the behaviour of two-phase gasliquid flow in multiphase flow pipelines. ... -
A Building Information Model (BIM) Based Lifecycle Assessment of a University Hospital Building Built to Passive House Standards
(Master thesis, 2012)This thesis undertook a whole building lifecycle assessment of a university hospital building in Trondheim, Norway designed to passive house standards. The delivered energy for electricity and heating was estimated to be ... -
A cartesian cut-cell method, based on formal volume averaging of mass, momentum equations
(Chapter, 2017)Simulation of multiphase flows are generally treated by various classes of Eulerian methods, Lagrangian methods and various combinations of these. In the SIMCOFLOW initiative we have set out to develop a framework for ... -
A case study of life cycle impacts of small-scale fishing techniques in Thailand
(Journal article; Peer reviewed, 2017)Fish provides an important source of protein, especially in developing countries, and the amounts of fish consumed are increasing worldwide (mostly from aquaculture). More than half of all marine fish are caught by small-scale ... -
A CFD analysis for the performance assessment of a novel design of plates-in-tank latent storage unit for freezing applications
(Chapter, 2019)In this paper, the charging and discharging processes of a recently developed cold thermal energy storage (CTES) unit integrated into a poultry processing plant is investigated. A mathematical model of the CTES was created ... -
A CFD-model of the Fluid Flow in a Hydrogen Peroxide Monopropellant Rocket Engine in ANSYS Fluent 16.2
(Master thesis, 2016)The use of hydrazine in monopropellant thrusters has dominated the market for several decades. Due to the toxic nature of hydrazine, the interest in developing thrusters based on green propellants has increased. A common ... -
A comparative Analysis of Propane and Ethylene Glycol as Intermediate Fluid in a LNG Regasification System
(Master thesis, 2015)A LNG regasification system with intermediate fluid vaporizer is studied. Two different intermediate fluids (IF), propane and a mix of mono-ethylene glycol and water, are compared for use in the system. The regasification ... -
A Comparative Analysis of the Environmental Impact of Floor Heating and Radiators: Assessing Embodied Emissions through LCA Case Studies using Brigthway2 and Activity Browser
(Master thesis, 2024)Kvantifisering og reduksjon av miljøpåvirkningen til bygninger står høyt på agendaen til både byggebransjen og akademia. Likevel har nåværende livssyklusanalyser (LCA) gjerne et ensidig fokus på drivhusgasser og globale ... -
A Comparative Life Cycle Assessment of PV Solar Systems
(Master thesis, 2013)In this report, a comparative life cycle assessment (LCA) of a rooftop, grid-connected photovoltaic (PV) system has been conducted. The primary objective has been to assess the environmental impacts resulting from the PV ... -
A Comparative Life Cycle Assessment of SpillTech Waterborne Plastic Waste Removal Systems
(Master thesis, 2022)I flere tiår har plast vært et uvurderlig materiale da verden kastet seg mot modernitet i en enestående hastighet. På grunn av end-of-life (EOL) miljøpåvirkninger av disse langlivede polymerene, har de blitt en gjennomgripende ... -
A comparative study of energy certification systems for buildings
(Master thesis, 2014)Due to the large amount of energy consumption in buildings and the biggest potential of energy and ecology savings, energy efficiency and sustainable construction represent the priorities of modern architecture and energetics ... -
A comparative study of the velocity and vorticity structure in pipes and boundary layers at friction Reynolds numbers up to 10^4
(Journal article; Peer reviewed, 2019)This study presents findings from a first-of-its-kind measurement campaign that includes simultaneous measurements of the full velocity and vorticity vectors in both pipe and boundary layer flows under matched spatial ... -
A comparison of lab-scale free rotating wind turbines and actuator disks
(Master thesis, 2020)Planar particle image velocimetry ble gjennomført oppstrøms og i den nærliggende vaken til en roterende vindturbinmodell i laboratorieskala og aktuatordisker av samme dimensjon i en vindtunell. Den innkommende strømningen ... -
A Comparison of Post-combustion Capture Technologies for the NGCC
(Journal article; Peer reviewed, 2017)Four different post-combustion capture technologies are compared for the same NGCC (electric efficiency 58.1% without CO2 capture). The technologies are aqueous amine, polymeric membranes, a low temperature sorbent and ... -
A comprehensive model for char particle conversion in environments containing O2 and CO2
(Journal article; Peer reviewed, 2015)In this work, conversion of char is studied in a simulation code that includes a simplified heterogeneous adsorption–desorption reaction mechanism for char chemical reactivity and uses GRI-Mech 3.0 as the chemical kinetic ...